Apparatus for igniting primers in wells.



No. 839,194. PATENTED DEC. 25, 1906. P. I. DU PONT. APPARATUS FOR. IGNITING PRIMERS IN WELLS.

APPLICATION FILED NOV. 8. 1906.

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, ing the longitudinal openings -UNITED STATES PATENT OFFICE.

FRANCIS I. DU PONT, OF WILMINGTON, DELAWARE, ASS] GNOR TO THE E. I.

.DU PONT DE N EMOURS POWDER COMPANY, OF WILMINGTON, DELA- 'WARE, A CORPORATION OF N EWJ ERSEY.

Specification of Letters Patent.

Patented Dec. 25, 1906.

Application filed November 8, 1906. Serial No. 342,470.

Be it known that I, FRANCIS I. DU PoNT, a citizen of the United States, residing at Wilmington, county of Newcastle, and State of Delaware, have invented a new and useful Improvement in Apparatus for Igniting Primers in Wells, of which the following is a full, clear, and exact description, reference being bad to the accompanying drawing, which forms a part of this specification.

By my invention, as I will hereinafter speoifically show, the fuse is subjected to an intensely hot atmosphere of gases .under pressure for a considerable period, which insures the ignition of the fuse. I accomplish this,

speaking generally, by using a comparaimprovement, which is shown in side elevation, partially in section, in the accompanying drawing.

In the drawing, in is the fusecase, having the fuse p therein. At the bottom of the fuse-case is the steel disk g, having a central opening through which the fuse 1) passes to t e primer 8.

1 is a rubber packing.

At the upper end of fuse p is a steel disk 0, having a central orifice through which projects the upper end of fuse p. The end of this fuse is in close roximity to the i 'tionpowder or char e which is confine in the cylinder m. T 's ignition-powder is placed in the tube 7), in which arejthe wires a a, leading from a source of current-supply and connected at the ignition charge by resistance i.

Surrounding, but not in contact with, the

ignition-powder l is a ring 72. of smokeless powder. Above this rin 'n and surrounding tube b is a'tube g of .smo eless powder, havh disk 11 Swimmiingt e o teringn an thetu egis the iron pipe the lower end of the pipe being surrounded by the upper end of fusecase k.

c is an iron pipe pressed tightly against pipe 6 and having an orifice through which tube b passes, rubber packing d closing the opening between tube b and pipe 0 and closing the upper end of the chamber in which the ignition and smokeless powders are placed. it is of sufficient strength to prevent rupture at the pressure of the well at the depth where the explosion is designed to take place. The interior ofchamber b is filled with rosin.

The operation is as follows: If, for instance,

the depth at which the fuse is placed is such that the outside pressure on the apparatus is, say, five hundred pounds, the chamber in which is the powder being sealed, the internal pressure is that of the atmosphere. Electric current being passed through the wires 0, a and resistance -11, the ignition-powder l and ring n are ignited. The flame from this ignition-powder and ring passes up through olpenings f in block 1), creating a combustion t roughout the cylinder g. This cylinder is of slow-burning powder. During the burning of cylinder 9 it is evolving gases, which are held from escaping by seal (1, and the pressure increases until it reaches a point high enough above that of the outside pressure to rupturethe packing d. This, however takes an appreciable time, and during 1 that time the fuse p is subjected to the ac- .tion of the fiame and of the intensely-hot atmosphere of the gases, thus positively in suring the ignition of the fuse. When the packing d is ruptured, the tube 1), with the wires, maybe removed and again used.

Having now fully described my invention, what I claim, and desire to protect by Letters Patent, is

1. In an apparatus for firing wells, in combination, a fuse, a chamber provided with a rupturable seal, slow-burning powder in said chamber, the fuse extending into said powder-chamber, and means to i nite said powder whereby the fuse is su jected to the flame and heated gases until the pressure produced is suflicient to rupture the seal.

2. In an apparatus for firing wells, in combination, a fuse, a tube, ignition-wires in said powder in said chamber, the fuse extending into said powder-chamber whereby the fuse is subjected to the flame and heated gases and the ignition-wire tube held in place until the pressure produced is sufficient to rupture the seal.

3. In an apparatus for firing wells, in combination, a fuse, a chamber provided with a rupturable seal, powder in said chamber, the fuse extending into said powder-chamber, and means to ignite said powder whereby the fuse is subjected to the flame and heated gases until the pressure produced is suflicient to rupture the seal.

4. In an apparatus for firing Wells, in combination, a fuse, a tube, ignition-wires in said tube, a chamber provided with a rupturable seal surrounding said tube, powder in said chamber, the fuse extending into said powder-chamber whereby the fuse is subjected to the flame and heated gases and the ignitionwire tube held in place until the pressure produced is sufficient to rupture the seal.

5. In an apparatus for firing wells, in combination, a fuse, a chamber provided with a rupturable seal, a powder-block in said cham her having longitudinal openings, said fuse extending into said powder-chamber, and means to ignite said powder.

6. In an a' paratus for firing wells, in combination, a se, a chamber'provided with a rupturable seal, a slowburning powderblock in said chamber having longitudinal openings, said fuse extending into said powgenchamber, and means to ignite said pow- '7. In an apparatus for firing wells, in combination, a fuse, a tube, ignition-wires in said tube, a chamber provided with a ru turable seal, surrounding said tube, a pow er-block in said chamber having longitudinal openings, the fuse extending into'said powderchamber. Y i

8. In an apparatus for firing wells, in combination, a fuse, a tube, ignition-wires in said tube, a chamber provided'with a rupturable seal, surrounding said tube, a slow-burning "powder-block in said chamber having longitudinal openings, the fuse extending into said powder-chamber.

9. In an apparatus for firing wells, in combination, a fuse,.a chamber provided with a. rupturable seal, slow-burning powder in said chamber, the fuse extending into said powderchamber, ignition-powder, and means to ignite said powder.

10. In an apparatus for firing wells, ir combination, a fuse, a chamber provided with a rupturable seal, powder in said chamber, the fuse extending into said powderchamber, ignition-powder, and means toignite said powder.

11. In an apparatus for firing wells, it combination, a fuse, a tube, i nition-wires it said tube, ignition-powder a apted to be ignited by said wires, a chamber provided witl a rupturable seal, surroundin said tube slow-burning powder in said 0 amber, thr fuse extending into said powder-chambei whereby the fuse is subjected to the flam( and heated gases and the ignition-wire'tubr held in place until the pressure produced i: sufficient to rupture the seal.

12. In an apparatus for firing wells, iI combination, a fuse, a tube, ignition-wires ir said tube, ignition-powder adapted to be i nited by said wires, a chamber provided wit a ru turable seal, surrounding said tube pow er in said chamber, the fuse extending into said powder-chamber whereby the fusr is subjectedto the flame and heated gase: and the ignition wire tube held in place unti the pressure produced is sufficient to ruptur the seal.

13. In an apparatus for firing. wells, i1 combination, a fuse, a chamber provided wit a rupturable seal, a powder-block in sai( chamber having longitudinal openin s, sai( fuse extending into said powder-cham er, ig nition-powder and means to ignite said igni tion-powder.

14. In an apparatus for firing wells, i1 combination, a fuse, a chamber provide( with a rupturable seal, a slow-burning pow der-block in said chamber having longitudi nal openings, said fuse extending into sai( powder-chamber, ignitionowder and mean: to ignite said ignition-pow er.

In testimony of which invention I havi hereunto set my hand, at Wilmington, 01 this, 5th day of November, 1906.

FRANCIS I. DU PONT.

Witnesses:

HENRY E. MEAD, IRVING EYER. 

